old R410a pipework with a new R32 split

[ForFoxSake]

Hi, I've got a dead MHI split on R410a, can i use install a new R32 split onto the pipework without using a flushing agent? New Fuj is same size. Pipe is buried in a wall. Fault was fan motor and PCB not burn out. My quote will be nuts is a need to replace the pipe! Cheers

[Greek_engineer]

Dry nitrogen first and then use the same tubes ......

[install monkey]

same pipework if its a 410a system
http://www.daikintech.co.uk/Data/Bluevolution/FDXM/2016/FDXM-F2V1B/R32_SM_ESIE15-05_tcm219-371844.pdf

[Goober]

I wouldn't have an issue with it. I call it "rounding the corners" not "cutting the corners"

Needs must.

[ForFoxSake]

I know the pipe size etc is good, i'm thinking oil problems?

[hyperion]

As mentioned above, dry nitrogen purge to remove any remaining oil etc. As R410A is made up of 50% R32, there should not be an oil compatibility or return problem.

[Sparkletron]

Blast it out with nitro and it'll be fine.
If it's not a burn out, your pretty safe.
Mhi 410 models run polyolester oil, I'm certain Fujitsu r32 is the same.